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authorNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>2017-08-01 12:14:36 +0200
committerDavid S. Miller <davem@davemloft.net>2017-08-01 17:54:38 -0700
commit3e3d647715d40173e359c91c69059b9cec7ba6ca (patch)
tree39d46d15696c2b87a3a8c4050e7bbff81ff85503 /drivers/net/ethernet/renesas/ravb.h
parent906a039d2f92c910e5c79a52da018b262bcd73b2 (diff)
downloadlinux-3e3d647715d40173e359c91c69059b9cec7ba6ca.tar.bz2
ravb: add wake-on-lan support via magic packet
WoL is enabled in the suspend callback by setting MagicPacket detection and disabling all interrupts expect MagicPacket. In the resume path the driver needs to reset the hardware to rearm the WoL logic, this prevents the driver from simply restoring the registers and to take advantage of that ravb was not suspended to reduce resume time. To reset the hardware the driver closes the device, sets it in reset mode and reopens the device just like it would do in a normal suspend/resume scenario without WoL enabled, but it both closes and opens the device in the resume callback since the device needs to be reset for WoL to work. One quirk needed for WoL is that the module clock needs to be prevented from being switched off by Runtime PM. To keep the clock alive the suspend callback need to call clk_enable() directly to increase the usage count of the clock. Then when Runtime PM decreases the clock usage count it won't reach 0 and be switched off. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/renesas/ravb.h')
-rw-r--r--drivers/net/ethernet/renesas/ravb.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 0525bd696d5d..96a27b00c90e 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -991,6 +991,7 @@ struct ravb_private {
struct net_device *ndev;
struct platform_device *pdev;
void __iomem *addr;
+ struct clk *clk;
struct mdiobb_ctrl mdiobb;
u32 num_rx_ring[NUM_RX_QUEUE];
u32 num_tx_ring[NUM_TX_QUEUE];
@@ -1033,6 +1034,7 @@ struct ravb_private {
unsigned no_avb_link:1;
unsigned avb_link_active_low:1;
+ unsigned wol_enabled:1;
};
static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)